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Question 20 (3 points) A question asks: How many ways can 7 people line up for a photo if Alice, Pete and Sally must sit

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Question 20 (3 points) A question asks: How many ways can 7 people line up for a photo if Alice, Pete and Sally must sit together? The SOLUTION is: 4! x 5 x 3! Explain in words below what each of the three parts of the solution represents. BE SPECIFIC

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